Which best states the overall structure of walden?
the work describes the effect spending time in nature has on thoreau, and then explains why it has that effect.
the work describes thoreau’s thoughts over the course of a year spent immersed in the natural world.
the work compares thoreau’s thoughts before coming to walden to his thoughts afterward.
the work shows how various problems thoreau had before he came to walden are solved by his retreat

The sentence that best states the overall structure of Walden is The work describes Thoreau's thoughts over the course of a year spent immersed in the natural world.

Explanation:

"Walden" by Henry David Thoreau talks about how he spent two years in Walden Pond, and goes through several topics seen by the new vision he got from being in contact with the nature and then going back to "civilization" as he mentions at the beginning of the book, he analyses social and economical topics from a different way of living.

huck's relationship with food is a prominent theme throughout the novel, and during his time on jackson's island and working his way down river, huck revels in and enjoys his ad hoc dining. in the first chapter, we observe huck is ironically trapped in a "civilized" world, when he would prefer to live freely in nature.